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-rw-r--r--lib/syntax_tools/test/syntax_tools_SUITE.erl28
1 files changed, 25 insertions, 3 deletions
diff --git a/lib/syntax_tools/test/syntax_tools_SUITE.erl b/lib/syntax_tools/test/syntax_tools_SUITE.erl
index 721d1fd87c..30e5e7b713 100644
--- a/lib/syntax_tools/test/syntax_tools_SUITE.erl
+++ b/lib/syntax_tools/test/syntax_tools_SUITE.erl
@@ -237,9 +237,31 @@ pretty_print_parse_forms([{Fs0,Type}|FsForms],PrivDir,Filename) ->
Parser = atom_to_list(Type),
OutFile = filename:join(PrivDir, Parser ++"_" ++ Filename),
io:format("Pretty print ~p (~w) to ~p~n", [Filename,Type,OutFile]),
- Fs1 = erl_syntax:form_list(Fs0),
- PP = erl_prettypr:format(Fs1),
- ok = file:write_file(OutFile,iolist_to_binary(PP)),
+ Comment = fun (Node,{CntCase,CntTry}=Cnt) ->
+ case erl_syntax:type(Node) of
+ case_expr ->
+ C1 = erl_syntax:comment(2,["Before a case expression"]),
+ Node1 = erl_syntax:add_precomments([C1],Node),
+ C2 = erl_syntax:comment(2,["After a case expression"]),
+ Node2 = erl_syntax:add_postcomments([C2],Node1),
+ {Node2,{CntCase+1,CntTry}};
+ try_expr ->
+ C1 = erl_syntax:comment(2,["Before a try expression"]),
+ Node1 = erl_syntax:set_precomments(Node,
+ erl_syntax:get_precomments(Node) ++ [C1]),
+ C2 = erl_syntax:comment(2,["After a try expression"]),
+ Node2 = erl_syntax:set_postcomments(Node1,
+ erl_syntax:get_postcomments(Node1) ++ [C2]),
+ {Node2,{CntCase,CntTry+1}};
+ _ ->
+ {Node,Cnt}
+ end
+ end,
+ Fs1 = erl_syntax:form_list(Fs0),
+ {Fs2,{CC,CT}} = erl_syntax_lib:mapfold(Comment,{0,0}, Fs1),
+ io:format("Commented on ~w cases and ~w tries~n", [CC,CT]),
+ PP = erl_prettypr:format(Fs2),
+ ok = file:write_file(OutFile,iolist_to_binary(PP)),
pretty_print_parse_forms(FsForms,PrivDir,Filename).